See: Kleiner, Janellyn P., and Charles A. Hamaker. 1997. Libraries 2000: Transforming Libraries Using Document Delivery, Needs Assessment, and Networked Resources. College & Research Libraries 58 (4):355-374, http://www.ala.org/ala/mgrps/divs/acrl/publications/crljournal/1997/jul/kleiner.pdf Bernie Sloan